#ifndef _NETINET_IP_H
#define _NETINET_IP_H

#ifdef __cplusplus
extern "C" {
#endif

#include <netinet/in.h>
#include <stdint.h>

struct timestamp {
  uint8_t len;
  uint8_t ptr;
#if __BYTE_ORDER == __LITTLE_ENDIAN
  unsigned int flags : 4;
  unsigned int overflow : 4;
#else
  unsigned int overflow : 4;
  unsigned int flags : 4;
#endif
  uint32_t data[9];
};

struct iphdr {
#if __BYTE_ORDER == __LITTLE_ENDIAN
  unsigned int ihl : 4;
  unsigned int version : 4;
#else
  unsigned int version : 4;
  unsigned int ihl : 4;
#endif
  uint8_t tos;
  uint16_t tot_len;
  uint16_t id;
  uint16_t frag_off;
  uint8_t ttl;
  uint8_t protocol;
  uint16_t check;
  uint32_t saddr;
  uint32_t daddr;
};

struct ip {
#if __BYTE_ORDER == __LITTLE_ENDIAN
  unsigned int ip_hl : 4;
  unsigned int ip_v : 4;
#else
  unsigned int ip_v : 4;
  unsigned int ip_hl : 4;
#endif
  uint8_t ip_tos;
  uint16_t ip_len;
  uint16_t ip_id;
  uint16_t ip_off;
  uint8_t ip_ttl;
  uint8_t ip_p;
  uint16_t ip_sum;
  struct in_addr ip_src, ip_dst;
};

#define IP_RF      0x8000
#define IP_DF      0x4000
#define IP_MF      0x2000
#define IP_OFFMASK 0x1fff

struct ip_timestamp {
  uint8_t ipt_code;
  uint8_t ipt_len;
  uint8_t ipt_ptr;
#if __BYTE_ORDER == __LITTLE_ENDIAN
  unsigned int ipt_flg : 4;
  unsigned int ipt_oflw : 4;
#else
  unsigned int ipt_oflw : 4;
  unsigned int ipt_flg : 4;
#endif
  uint32_t data[9];
};

#define IPVERSION    4
#define IP_MAXPACKET 65535

#define IPTOS_ECN_MASK    0x03
#define IPTOS_ECN(x)      ((x) & IPTOS_ECN_MASK)
#define IPTOS_ECN_NOT_ECT 0x00
#define IPTOS_ECN_ECT1    0x01
#define IPTOS_ECN_ECT0    0x02
#define IPTOS_ECN_CE      0x03

#define IPTOS_DSCP_MASK 0xfc
#define IPTOS_DSCP(x)   ((x) & IPTOS_DSCP_MASK)
#define IPTOS_DSCP_AF11 0x28
#define IPTOS_DSCP_AF12 0x30
#define IPTOS_DSCP_AF13 0x38
#define IPTOS_DSCP_AF21 0x48
#define IPTOS_DSCP_AF22 0x50
#define IPTOS_DSCP_AF23 0x58
#define IPTOS_DSCP_AF31 0x68
#define IPTOS_DSCP_AF32 0x70
#define IPTOS_DSCP_AF33 0x78
#define IPTOS_DSCP_AF41 0x88
#define IPTOS_DSCP_AF42 0x90
#define IPTOS_DSCP_AF43 0x98
#define IPTOS_DSCP_EF   0xb8

#define IPTOS_CLASS_MASK    0xe0
#define IPTOS_CLASS(x)      ((x) & IPTOS_CLASS_MASK)
#define IPTOS_CLASS_CS0     0x00
#define IPTOS_CLASS_CS1     0x20
#define IPTOS_CLASS_CS2     0x40
#define IPTOS_CLASS_CS3     0x60
#define IPTOS_CLASS_CS4     0x80
#define IPTOS_CLASS_CS5     0xa0
#define IPTOS_CLASS_CS6     0xc0
#define IPTOS_CLASS_CS7     0xe0
#define IPTOS_CLASS_DEFAULT IPTOS_CLASS_CS0

#define IPTOS_TOS_MASK    0x1E
#define IPTOS_TOS(tos)    ((tos) & IPTOS_TOS_MASK)
#define IPTOS_LOWDELAY    0x10
#define IPTOS_THROUGHPUT  0x08
#define IPTOS_RELIABILITY 0x04
#define IPTOS_LOWCOST     0x02
#define IPTOS_MINCOST     IPTOS_LOWCOST

#define IPTOS_PREC_MASK            0xe0
#define IPTOS_PREC(tos)            ((tos) & IPTOS_PREC_MASK)
#define IPTOS_PREC_NETCONTROL      0xe0
#define IPTOS_PREC_INTERNETCONTROL 0xc0
#define IPTOS_PREC_CRITIC_ECP      0xa0
#define IPTOS_PREC_FLASHOVERRIDE   0x80
#define IPTOS_PREC_FLASH           0x60
#define IPTOS_PREC_IMMEDIATE       0x40
#define IPTOS_PREC_PRIORITY        0x20
#define IPTOS_PREC_ROUTINE         0x00

#define IPOPT_COPY        0x80
#define IPOPT_CLASS_MASK  0x60
#define IPOPT_NUMBER_MASK 0x1f

#define IPOPT_COPIED(o) ((o) & IPOPT_COPY)
#define IPOPT_CLASS(o)  ((o) & IPOPT_CLASS_MASK)
#define IPOPT_NUMBER(o) ((o) & IPOPT_NUMBER_MASK)

#define IPOPT_CONTROL     0x00
#define IPOPT_RESERVED1   0x20
#define IPOPT_DEBMEAS     0x40
#define IPOPT_MEASUREMENT IPOPT_DEBMEAS
#define IPOPT_RESERVED2   0x60

#define IPOPT_EOL  0
#define IPOPT_END  IPOPT_EOL
#define IPOPT_NOP  1
#define IPOPT_NOOP IPOPT_NOP

#define IPOPT_RR        7
#define IPOPT_TS        68
#define IPOPT_TIMESTAMP IPOPT_TS
#define IPOPT_SECURITY  130
#define IPOPT_SEC       IPOPT_SECURITY
#define IPOPT_LSRR      131
#define IPOPT_SATID     136
#define IPOPT_SID       IPOPT_SATID
#define IPOPT_SSRR      137
#define IPOPT_RA        148

#define IPOPT_OPTVAL 0
#define IPOPT_OLEN   1
#define IPOPT_OFFSET 2
#define IPOPT_MINOFF 4

#define MAX_IPOPTLEN 40

#define IPOPT_TS_TSONLY    0
#define IPOPT_TS_TSANDADDR 1
#define IPOPT_TS_PRESPEC   3

#define IPOPT_SECUR_UNCLASS   0x0000
#define IPOPT_SECUR_CONFID    0xf135
#define IPOPT_SECUR_EFTO      0x789a
#define IPOPT_SECUR_MMMM      0xbc4d
#define IPOPT_SECUR_RESTR     0xaf13
#define IPOPT_SECUR_SECRET    0xd788
#define IPOPT_SECUR_TOPSECRET 0x6bc5

#define MAXTTL    255
#define IPDEFTTL  64
#define IPFRAGTTL 60
#define IPTTLDEC  1

#define IP_MSS 576

#define __UAPI_DEF_IPHDR 0

#ifdef __cplusplus
}
#endif

#endif
